someone could do something with one hand tied behind his/her back
US /ˈsʌm.wʌn kʊd duː ˈsʌm.θɪŋ wɪð wʌn hænd taɪd bɪˈhaɪnd hɪz hɜːr bæk/
UK /ˈsʌm.wʌn kʊd duː ˈsʌm.θɪŋ wɪð wʌn hænd taɪd bɪˈhaɪnd hɪz hɜːr bæk/
1.
片手でできる, 楽勝でできる
to be able to do something very easily, even under difficult circumstances
:
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He's so skilled, he could do this job with one hand tied behind his back.
彼はとても熟練しているので、片手を後ろに縛られてもこの仕事をこなせるだろう。
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For an experienced chef, making this dish is like doing it with one hand tied behind their back.
経験豊富なシェフにとって、この料理を作るのは片手を後ろに縛られてもできるようなものだ。